The driver will monitor the arrival status of the flight, and once your flight lands he will contact you on your cell phone to give you instructions to the pickup area, and description to the car.
When you pay online for your trip or for someone else trip, there is an option to put instructions/ name on reservation. You can put the name on the reservation, and other instructions.
No, however your driver will appreciate a tip based on the level of service provided.
For an additional $25, your driver will meet you inside the terminal holding a sign with your name on it and he will assist you with your luggage.